Reamer



Feb. 6, 1940. JQNES 2,189,036

I REAMER Original Filed D80. 16, 1938 7 Patented Feb. 6,

v U TED STATES PATENT] REAMER v Kenneth E. Jones, Houston, Tex., assignor to Reed Roller Bit Company, Houston, Tex., a cori 3' r poration of Texas Application December 16, 1938,,Serial No. 246,183

r Renewed August 9, 1939 I 6 Claims. (o1.255 73) This-invention relates to reamersgfor use in the drilling of wells. It has for its general object the provision of a structure whereby a reamer cutter of the roller type n'iay befirmly and rigidly amounted within a cutter recess in a reamer body.

-In mounting reamer cutters within their recesses it is" desirable that they be mounted as firmly as possible and it is' desirable that there be no possibility of play between any ofthe parts H constituting the mountingfduring the operation of-the reamer. I

It is, therefore, an object of this invention to provide a structure for mounting a reamer cutter in a recess in the side of the reamer body .in such 1 amanner asto give thegreatest possible degree of rigidity to. the mounting, prevent any play. or lost motionbetween the parts of the mounting during-operation, and to eliminate any parts which might easily be broken, distortedv .or dislodged during the operation- "i :Itisa furtherobject to provide a. structure of I the type set forth in which no welding, or the like,'is employed in mounting .a'reamer cutter w within a cutter recess in a reamer body, or in removing, the same therefrom. Another object is'toprovidea means for quickly and easily removing a reamer cutterfrom its'mounting in its reamer body and replacing the; same in such -mounting without-- necessity for any special skill Q or for any'special tools not ordinarily at, hand.

It is a further object toprovide a structure .of'thetype set forth in which acutter assembly,

consisting of a cutter, ascutter pinand endxsupports therefor, may be secured to a reame'r body and removed therefrom as a unit, andin which the parts of such assembly or -unit may ,be' promptlyassembled in proper relation with respect to each other so as to insure 'propermount-' ing of the cutter.

Other objects and advantages of this invention will become apparent fromthe following. description taken in connection with' the. accom- 1 Denying drawing, it being understood that "the Fig 3 is a horizontal cross section taken along the line of Fig.1.

..Fig. l'is a side elevation of a reamerlbodycone,

. Fig.4 is a horizontal cross section taken along; the line 44 of Fig. 1. I 1.. r; Fig.5 is a viewsimilar to Fig. 3, but showing I a slight modification. 1 In accordance with this invention, a reamer bodyl is formed with a major. recess 2 and with auxiliary recesses 3 and 4, respectively, at the op.- v

posite ends of and opening into-the. major recess- These auxiliary recesses are of the cross sec-.. tional shape illustrated in Figs. 3 and 4, and'have in" side walls, aslshown at 5, tapering toward each- 1 other in a direction away from the center of the reamer body. That is, the recesses? and 4 are narrower at their outermost parts than at their bottoms, or innermost parts. of substantially the'same width'zfrom one end-- -totheother., H -Theumajor recess 2 is adapted to receive'a.

cutter 6 which is rotatably mounted upon'a shaft or cutter pin. 7. The opposite ends. of the cutter, in plus 1 are carried in recesses formedin blocks 8 and 9, respectively, and secured therein by means of welding, as shown at liland ll, respectively. These blocksare so mounted upon the pin 7 as to properly confine the cutter 6 against end.-.

Wise movementand yet leave it suificientlyloose to rotate freely. The blocks 8 and 9 are. each provided on theirportions adapted to fit within the auxiliary recesses 3 and 4 with dowel pins [2 and I3, respectively, these dowel pins being adapted to enter'openings l4'and l5 formed in the bottom surfaces of the respective auxiliary recesses I Fitting within each of the auxiliaryrecesses' is a sliding wedg ing block [6, the outer. surfaces of which are tapered to fit the side walls of the' auxiliary recesses and the end of which, on that portion closest to the major recess, is adapted to fit againstxa shoulder onthe outer portion of the blocks 8 and 9.

ll of the-blocks'8 and 9 and to receive a wedge l8 between such tongue'like parts I! andthe outer portion of the block Hi. The under surfaces" of each of the tongue like parts "is cut away to receive the headportion of a cotter key, i9, these cotter keys being placed in positionfwithin these cut away portions prior to the time" that the blocks 8 and '9 are placed in their respective auxiliary recesses. v In operation, thecutter 6 is first placed upon, the cutter pin 1 and the'blocks 8; and 9 .are welded in place on the ends of this cutter pin 'by means of the welding l0 andl I. Thedowel pins l2 andll3 arethen positioned tofprojectironi the inner They are, however, 15

r g Eachofthese wedging blocks 3: I6 is hollowed out to receive the'tongue-like parts surface of the blocks 8 and 9. The sliding wedging blocks I6 are then placed in the respective auxiliary recesses and moved as far toward the opposite ends thereof as possible. The cutter assembly is now placed imposition with the blocks 8 and 9 Within the auxiliary recesses and with the dowel pins Hand l3 projectlnginto the open.- ings Id arid th properly position thea'ssembly.

The sliding wedging blocks. l6 are now slid over the tongue like parts ll of the blocks 8 and 9 and the wedges l8 are inserted between these tongue-like parts and the blocks l6 and driven home. The cotter keys H! which have previously been placed in proper positionwill project through openings formed in the downwardly extending flanges 2i] on the wedges l8 and when the wedges l8 have been driven home; these cotter keys will be expanded to hold the wedges in place.

When it is desired to remove the cutter assembly which is thus positioned in a reamer body, the cotter'keys I9 are first closed and then some driving member, such as 2!, placed against the flange 22 of each of the wedges H5 in succession and these wedges driven out by means of a ham mer, or the like. Immediately when these wedges have been removed, the blocks It may be slid from their position over the tongue like parts I! and the cutter assembly may be lifted out of the body- 1 In the modification shown in Fig. 5, the parts and operation will be found to be identical with the-exception that instead of the sliding weclging blocks it, there is employed a block 23 whichis T-shaped and has lateral extending flanges 2A. The auxiliary recesses instead of having sloping or tapering side walls, have walls such'that these auxiliary recesses are in the form of T-slots so asto receive the blocks 2% The same cutter assembly is employed utilizing the blocks '8 and 9 having the tongue I! thereon and the cotter'keys l9 employed in connection therewith. The wedges I8 may be identical with those previously described. 'It will be seen from the foregoing that means has -been;providedwhereby a cutter assembly may be readily, easily and quickly mounted within a cutter body in such a manner that it cannot be'readily displaced or damaged except for the usual damage incident to use, and that the number of parts has been reduced to a minimum. It is further to be noted that the cutter assembly may be made and assembled at the factory, or other place where they may be. properly arranged so as to permit rotation and proper very readily in the field.

' Having described my invention, I claim:

1. In a reamer construction, a reamer body having a major recess in, its outer surface, and

operation "of the cutters, yet may be changed an auxiliary recess at each end of said major recess, each of said auxiliary. recesses tapering toward a smaller dimensionin a direction outward fromthe center of said reamer body and being of substantially uniform width from end to end, a correspondingly tapered wedging block slidably mounted in each of said recesses and having a hollowed out portion disposed toward the center of the reamerbody, a cutter assembly comprising a cutter adapted to be mounted within said major recess, a cutter pin within said cutter for rotatably mounting the same and a pair of supporting blocks secured to the opposite ends of said cutter pin, each of said supporting blocks being adapted to lie withinpne of said auxiliary 'rece s's'es and-name a tongue like part adapted to end, a correspondingly tapered wedging block,

auxiliary recesses and having a tongue like part,

than adjacent the bottom of the recess, a block to. be received within the hollowed out portion-S 'of the sliding block within. saidrecess, anda wedge adapted to enter the said cutaway por. y Y tion of the sliding block and be wedgedlbetween j that portion and the tongue like part. of said 5 supporting block. "2. In a reamer .construction,. a;rean1er body having a major recess -in its outer s race, and an auxiliary recess at attend or said'major, recess, each of saidiauxiliary'recesses tapering 10, toward a' smaller'dimensionin a direction outward from the center of said reamer bodyand I being of substantially. uniform width from end .the center of the reamer body, a cutter assembly comprising a cutter adapted to-be mounte'dwith in said major recess, a cutterpin within said cutter for rotatably mounting the same, and; a 20. pair of supporting'blocks secured to the opposite ends of saidcutter pin; each of said supporting blocks being-adapted to lie within one of said adapted to be received within the hollowed out portion of the sliding block withinf's'aid recess, and a wedge adapted to enter the said 'cutaway portion of th'eislidingi block and be wedged be-f f" tween that portion and the tongue like part of said supporting block, and means for securin said wedge in engaged'position I ,3. In a reamer constructionpa reamer-body f having a'major recess in itsouter surface, and i a an auxiliary recess at each end of said major re cess, each fofsaid, auxiliary recesses tapering t 0.-; ward a-smaller dimension in a directionoutward from thecenter of said'ream'er body'and'beingof substantially uniform :width from end to end},

a corre'zspondin'gly taperedwedging block slid ably mounted in each of said recesses and having ter the dice-a cutter assembly com i prising a cutte'r adapted to be mounted within said major recess, a cutter pinwithin said cutter j for rotatably-mounting the'same and a' p'air of supporting ,blocks' secured to the opposite ends,

of saidtcutter pin, each of "saidsupp'orting "blocks" blocks withjrespect to-said body and for preventing sliding movement of said blocks with res'pect' to saidbody when they have: been properly posi- I tionejd with respect thereto. j v 1 g 4. In'areamerconstruction, a reamer body 9"" having a major recess mas outer surface and. an auxiliaryrecess'at'each end of'said major recess,. each oi'said'auxiliary recessesfbeingnarj rower adjacent thev outer surface of saiclloody" slidingly mounted in'each'of saidauxiliary 're- 7 ces'ses, a reamer cutter; adaptedtoibe mounted insaid major recess,=af cutter pin for rotatab ly supporting said'reamer cutter, a pair'of-suppdrt i ing blocks secured to the opposite-en of? said cutter pin'respectively parts .ofsaid blocks adap ed to be received between said, sliding blocks ar e the bottoms of said "auxiliary recesses, Land. wedges for engaging between said sliding blocks'* nj a hollowedout portion disp'osedtoward the cenf;

and said parts of said supporting blocks to 'secure said supporting blocks in position.

5. In a reamer construction, a reamer body having a major recess in its outer surface and an auxiliary recess at each end of said major reicess, eachof said auxiliary recesses having a T- shape cross section and being narrower adjacent the outer surface of said body than adjacent the bottom of the recess, a reamer cutter adapted to be mounted in said major recess, a cutter pin adapted to rotatably support said reamer cutter,

a pair of supporting blocks secured to the oppo-- site ends of said cutter pin respectively, a block having a 'T-s'hape outer configuration in cross section s-lidingly mounted within each of said auzdliaryrecesses, each of said supporting blocks having a part adapted tolie between one of said sliding blocks and the bottom of the corresponding auxiliary recess, and wedges adapted to engage between each. of said sliding blocks and the said parts of said supporting blocks to wedge said supporting blocks in place against the bottoms of said auxiliary recesses.

6. In a reamer construction, a reamer body having a major recess in its outer surface and an auxiliary recessat one end of said major recess, said auxiliary recess being narrower adjacent the outer surface of said body than adjacent the bottom of the recess, a block slidingly mounted in 

